Process and apparatus por extracting- ores



R. WALLNER.

PROCESS AND APAHATUS FOR EXTRACTING ORES.

l APPLICATION FILED OCT- 20| 19H. 1,326, 125, Patented Dec. 23, 1919.

nmcuiatA Rasa, me'

ROSA WALLNER, OF BIS'BEEJ ARIZONA. i

PROCESS AND AIPPARIJIIII'S` FOR VEX'IRACTING CRES.

Application led October 20, 1917.

To all whom t may concern:

v Be it known that I, ROSA WALLNER, a-

subject of the Emperor of Germany, residing at Bisbee, in the county ofCochise and State o-f Arizona, have invented certain new and usefulImprovements in Processes and Apparatus for Extracting Ores; and I doherebyv declare the following' to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.V

This invention relates to apparatuses and processes for roasting orespreparatory to further treatment in the extraction of the metal content,and has for an object to provide a retort mechanism adapted to subjectthe ore therein to the required degree of heat while agitating thecontained ores and subjecting such ores to a Vliow of fresh air throughtheV interstices of the ore mass within the retort, thus more rapidlyand completely effecting the desired chemical change.

A further object of the invention is to provide a retort located withina furnace with means for rotating the retort while air is'forcedalternately in opposite directions through the retort duringV suchrotation and roasting process.

In the drawings,--

Figure 1 is a vertical sectional `view through the furnace, retort andair pump.

Fig. 2 is a horizontal vsectional view through the furnace and retortshowing the pump in top plan.

Like characters of reference designate corresponding parts throughoutthe several views.

The present process may be carried out in apparatuses varying somewhatfrom the apparatus disclosed in the drawing, but must embodysubstantially a furnace 10 having means for supporting combustion asindicated at 11 with a flue 12 for' carrying off the products ofcombustion. A retort 13 is mounted to rotate in the furnace by beingextended longitudinally through the furnace, the apertures in thefurnace corresponding substantially with the size of the retort,permitting rotation. The retort is mounted upon hollow shafts 14 and 15which are in turn journaled in bearings 16 and 17, respectively, pipes18 and 19 oommunicating also with such bearings and Specicaton ofLetters Patent.

Patented-Dee. 23, 1919.

serial no. 197,689.

forming non-rotatable extensions of the hollow shafts 14 and 15.

Conveniently located an' air pump 20 is employed having a piston 21mounted therein operated from a crank 22 carried upon a shaft 23 drivenin any approved manner as by the belt 24. Mounted also upon the shaft 23is a pulley 25, a belt 21 being carried therefrom to a pulley 27 mountedupon the hollow shaft 14 so that the retort 13 is also-driven from theshaft 23.

From opposite ends of the pump 20 pipes 28 and 29 are carriedcommunicating respectively with the pipes 18 and 19. rThe pump isprovided with inlet valves 30 and 31 and check valves 32 and 33 aremounted in the pipes 28 and 29, respectively.

The pipes 18 and 19 at their ends opposite the shafts 14 and 15`communicate respectively with boxes 34 and 35 which are cov eredwith aforaminous material 36. The retort 13 is provided with one or more doors37 in one or both ends where the retort extends outwardly beyond thelines of the furnace 10. Also the furnace 10 is provided with rollers 38upon which the extended ends of the retort bear and rotate.

In operation, the ore to be roasted is inserted into the retort throughone or bot-h of the door openings 37 and commingled with charcoal orother fuel if found desirable to accomplish the purpose aimed at. The.combustion supported below the retort as shown particularly at Fig. 1,raises the temperature within the retort to such degree as to roast theore and to ignite the fuel contained therein if fuel is commingled withthe ore, as stated. Then the temperature of the ore mass has been raisedto the desired temperature the pump 20 is started by the rotation of theshaft 23, also rotating the retort 13. The rotation of the retortagitates the ore mass contained therein to expose new and unefected oresurfaces to the action of the air passed through such retort by theaction of the pump 20. rIhe air forced by the pump 20` through the pipe28 upon the movement of the piston 21 in one direction passes into thepipe 18 and from such pipe branches one part of the air passing directlythrough the hollow shaft 14 and the retort, another part passing intothe box 34. When the piston has reached the limit of its stroke thecheck valve 32 operates to prevent return of the air from the pipe 28,which has been passed through the retort, the shaft 15, and pipe 19 intothe boX 35, carrying therewith dust and other impure matters. Theforaminous covers of the boxes Bt and permit the escape slowly of thevitiated air While retaining the dust and the like Within the box.I Thereturn stroke of the piston 21 produces the same effect in reversedorder through the pipe 29 and shaft 15 into the box 34:.

I claim: l

r1. The process of roasting ores, consisting in introducing the oresinto a rotating retort, maintaining heat upon the exterior of theretort, forcing fresh air alternately '1n opposite directions throughthe rotating retort and discharging the air vitiated by passing throughthe retort.

2. The process of roasting ores, consisting in introducing the ores intoa rotating retort commingled with a combustible inaterial, maintainingheat upon the exterior of the retort sufiicient to raise the ore to thedesired temperature and ignite the combustible material, forcing freshair in opposite directions through the heated and ignited mass anddischarging' the air vitiated by passing through the retort.

3. An apparatus for roasting ores comprising' a furnace, a rotatingretort mounted in the furnace and having its ends extending' beyond theexterior lines of the furnace, an air pump cominunicatiing` by conduitswith the axes of the rotating retort, said pump being provided withmeans to take in fresh air, and means to discharge the gases resultantupon forcing' air through the retort.

d. An apparatus for roasting ores comirn'ising a furnace, a cylindricalretort mounted Within and having its opposite ends eX- tending outwardlybeyond the lines of the furnace, a charging door formed in one of theextended ends of the cylindrical retort, hollow pipes forming trunnionsfor the retort, an air pump conmiunicating by conduits with the hollowtrunnions, said pump provided With means to take in fresh air, and meansto discharge the gases resultant upon forcing` air through the retort.

ln an apparatus for roasting ores, a furnace,` a retort mounted movablyWithin the furnace, means to move the retort to agitate the contents, anair pump, conduits extending from the air pump into opposite sides ofthe retort, receptacles having foraminous portions communicating alsoWith the conduits and means to discharge the gases resultant uponforcing air through the retort.

In testimony whereof l affix my signature.

ROSA WALLNER.

